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Start shearing
This commit is contained in:
Miloslav Číž
parent
7af9d3e378
commit
c9c32bdd8d
94
main.c
94
main.c
@ -141,6 +141,16 @@ void SFG_init();
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#define SFG_HEADBOB_ENABLED (SFG_HEADBOB_SPEED > 0 && SFG_HEADBOB_OFFSET > 0)
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#define SFG_CAMERA_SHEAR_STEP_PER_FRAME \
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((SFG_GAME_RESOLUTION_Y * SFG_CAMERA_SHEAR_SPEED) / SFG_FPS)
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#if SFG_CAMERA_SHEAR_STEP_PER_FRAME == 0
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#define SFG_CAMERA_SHEAR_STEP_PER_FRAME 1
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#endif
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#define SFG_CAMERA_MAX_SHEAR_PIXELS \
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(SFG_CAMERA_MAX_SHEAR * SFG_GAME_RESOLUTION_Y / 1024)
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#define SFG_FONT_SIZE_SMALL \
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(SFG_GAME_RESOLUTION_X / (SFG_FONT_CHARACTER_SIZE * 50))
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@ -214,19 +224,28 @@ void SFG_recompurePLayerDirection()
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SFG_player.direction = RCL_angleToDirection(SFG_player.camera.direction);
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SFG_player.direction.x = (SFG_player.direction.x * SFG_PLAYER_MOVE_UNITS_PER_FRAME) / RCL_UNITS_PER_SQUARE;
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SFG_player.direction.y = (SFG_player.direction.y * SFG_PLAYER_MOVE_UNITS_PER_FRAME) / RCL_UNITS_PER_SQUARE;
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SFG_player.direction.x =
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(SFG_player.direction.x * SFG_PLAYER_MOVE_UNITS_PER_FRAME)
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/ RCL_UNITS_PER_SQUARE;
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SFG_player.direction.y =
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(SFG_player.direction.y * SFG_PLAYER_MOVE_UNITS_PER_FRAME)
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/ RCL_UNITS_PER_SQUARE;
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SFG_backgroundScroll =
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((SFG_player.camera.direction * 8) * SFG_GAME_RESOLUTION_Y) / RCL_UNITS_PER_SQUARE;
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((SFG_player.camera.direction * 8) * SFG_GAME_RESOLUTION_Y)
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/ RCL_UNITS_PER_SQUARE;
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}
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void SFG_initPlayer()
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{
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RCL_initCamera(&SFG_player.camera);
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SFG_player.camera.resolution.x = SFG_GAME_RESOLUTION_X / SFG_RAYCASTING_SUBSAMPLE;
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SFG_player.camera.resolution.x =
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SFG_GAME_RESOLUTION_X / SFG_RAYCASTING_SUBSAMPLE;
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SFG_player.camera.resolution.y = SFG_GAME_RESOLUTION_Y;
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SFG_player.camera.height = RCL_UNITS_PER_SQUARE * 12;
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SFG_player.camera.position.x = RCL_UNITS_PER_SQUARE * 15;
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SFG_player.camera.position.y = RCL_UNITS_PER_SQUARE * 8;
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@ -396,7 +415,7 @@ void SFG_pixelFunc(RCL_PixelInfo *pixel)
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{
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#if SFG_DITHERED_SHADOW
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uint8_t fogShadow = (pixel->depth * 4) / (RCL_UNITS_PER_SQUARE);
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uint8_t fogShadowPart = fogShadow & 0x07;
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fogShadow /= 8;
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@ -749,8 +768,31 @@ void SFG_gameStep()
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int8_t strafe = 0;
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#if SFG_HEADBOB_ENABLED
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int8_t bobbing = 0;
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#endif
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int8_t shearing = 0;
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if (SFG_keyPressed(SFG_KEY_A))
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{
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if (SFG_keyPressed(SFG_KEY_UP))
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{
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SFG_player.camera.shear =
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RCL_min(SFG_CAMERA_MAX_SHEAR_PIXELS,
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SFG_player.camera.shear + SFG_CAMERA_SHEAR_STEP_PER_FRAME);
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shearing = 1;
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}
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else if (SFG_keyPressed(SFG_KEY_DOWN))
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{
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SFG_player.camera.shear =
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RCL_max(-1 * SFG_CAMERA_MAX_SHEAR_PIXELS,
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SFG_player.camera.shear - SFG_CAMERA_SHEAR_STEP_PER_FRAME);
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shearing = 1;
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}
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if (SFG_keyPressed(SFG_KEY_LEFT))
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strafe = -1;
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else if (SFG_keyPressed(SFG_KEY_RIGHT))
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@ -771,6 +813,23 @@ void SFG_gameStep()
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if (recomputeDirection)
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SFG_recompurePLayerDirection();
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if (SFG_keyPressed(SFG_KEY_UP))
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{
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moveOffset.x += SFG_player.direction.x;
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moveOffset.y += SFG_player.direction.y;
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#if SFG_HEADBOB_ENABLED
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bobbing = 1;
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#endif
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}
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else if (SFG_keyPressed(SFG_KEY_DOWN))
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{
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moveOffset.x -= SFG_player.direction.x;
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moveOffset.y -= SFG_player.direction.y;
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#if SFG_HEADBOB_ENABLED
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bobbing = 1;
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#endif
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}
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}
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if (SFG_keyPressed(SFG_KEY_STRAFE_LEFT))
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@ -804,25 +863,14 @@ void SFG_gameStep()
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(SFG_player.verticalSpeed - SFG_GRAVITY_SPEED_INCREASE_PER_FRAME);
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#endif
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#if SFG_HEADBOB_ENABLED
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int8_t bobbing = 0;
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#endif
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if (!shearing && SFG_player.camera.shear != 0)
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{
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// gradually shear back to zero
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if (SFG_keyPressed(SFG_KEY_UP))
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{
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moveOffset.x += SFG_player.direction.x;
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moveOffset.y += SFG_player.direction.y;
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#if SFG_HEADBOB_ENABLED
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bobbing = 1;
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#endif
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}
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else if (SFG_keyPressed(SFG_KEY_DOWN))
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{
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moveOffset.x -= SFG_player.direction.x;
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moveOffset.y -= SFG_player.direction.y;
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#if SFG_HEADBOB_ENABLED
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bobbing = 1;
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#endif
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SFG_player.camera.shear =
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(SFG_player.camera.shear > 0) ?
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RCL_max(0,SFG_player.camera.shear - SFG_CAMERA_SHEAR_STEP_PER_FRAME) :
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RCL_min(0,SFG_player.camera.shear + SFG_CAMERA_SHEAR_STEP_PER_FRAME);
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}
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#if SFG_HEADBOB_ENABLED
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31
raycastlib.h
31
raycastlib.h
@ -26,7 +26,7 @@
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author: Miloslav "drummyfish" Ciz
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license: CC0 1.0
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version: 0.87
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version: 0.88
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*/
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#include <stdint.h>
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@ -280,6 +280,10 @@ typedef struct
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very often.
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*/
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typedef RCL_Unit (*RCL_ArrayFunction)(int16_t x, int16_t y);
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/*
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TODO: maybe array functions should be replaced by defines of funtion names
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like with pixelFunc? Could be more efficient than function pointers.
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*/
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/**
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Function that renders a single pixel at the display. It is handed an info
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@ -1034,7 +1038,7 @@ RCL_Unit RCL_adjustDistance(RCL_Unit distance, RCL_Camera *camera,
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}
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/// Helper for drawing floor or ceiling. Returns the last drawn pixel position.
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static inline int16_t _RCL_drawVertical(
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static inline int16_t _RCL_drawHorizontalColumn(
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RCL_Unit yCurrent,
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RCL_Unit yTo,
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RCL_Unit limit1, // TODO: int16_t?
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@ -1058,13 +1062,19 @@ static inline int16_t _RCL_drawVertical(
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int16_t limit = RCL_clamp(yTo,limit1,limit2);
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RCL_Unit depth = 0; /* TODO: this is for clamping depth to 0 so that we don't
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have negative depths, but we should do it more
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elegantly and efficiently */
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_RCL_UNUSED(depth);
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/* for performance reasons have different version of the critical loop
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to be able to branch early */
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#define loop(doDepth,doCoords)\
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{\
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if (doDepth) /*constant condition - compiler should optimize it out*/\
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{\
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pixelInfo->depth += RCL_absVal(verticalOffset) *\
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depth = pixelInfo->depth + RCL_absVal(verticalOffset) *\
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RCL_VERTICAL_DEPTH_MULTIPLY;\
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depthIncrement = depthIncrementMultiplier *\
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_RCL_horizontalDepthStep;\
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@ -1080,7 +1090,10 @@ static inline int16_t _RCL_drawVertical(
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{\
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pixelInfo->position.y = i;\
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if (doDepth) /*constant condition - compiler should optimize it out*/\
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pixelInfo->depth += depthIncrement;\
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{\
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depth += depthIncrement;\
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pixelInfo->depth = RCL_max(0,depth); /*TODO: optimize */\
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}\
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if (doCoords) /*constant condition - compiler should optimize it out*/\
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{\
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RCL_Unit d = _RCL_floorPixelDistances[i];\
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@ -1287,7 +1300,7 @@ void _RCL_columnFunctionComplex(RCL_HitResult *hits, uint16_t hitCount, uint16_t
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p.depth = 0;
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#endif
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limit = _RCL_drawVertical(fPosY,fZ1Screen,cPosY + 1,
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limit = _RCL_drawHorizontalColumn(fPosY,fZ1Screen,cPosY + 1,
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_RCL_camera.resolution.y,fZ1World,-1,RCL_COMPUTE_FLOOR_DEPTH,
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// ^ purposfully allow outside screen bounds
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RCL_COMPUTE_FLOOR_TEXCOORDS && p.height == RCL_FLOOR_TEXCOORDS_HEIGHT,
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@ -1307,7 +1320,7 @@ void _RCL_columnFunctionComplex(RCL_HitResult *hits, uint16_t hitCount, uint16_t
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_RCL_horizontalDepthStep;
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#endif
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limit = _RCL_drawVertical(cPosY,cZ1Screen,
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limit = _RCL_drawHorizontalColumn(cPosY,cZ1Screen,
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-1,fPosY - 1,cZ1World,1,RCL_COMPUTE_CEILING_DEPTH,0,1,&ray,&p);
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// ^ purposfully allow outside screen bounds here
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@ -1472,7 +1485,7 @@ void _RCL_columnFunctionSimple(RCL_HitResult *hits, uint16_t hitCount,
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p.depth = 1;
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p.height = RCL_UNITS_PER_SQUARE;
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y = _RCL_drawVertical(-1,wallStart,-1,_RCL_middleRow,_RCL_camera.height,1,
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y = _RCL_drawHorizontalColumn(-1,wallStart,-1,_RCL_middleRow,_RCL_camera.height,1,
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RCL_COMPUTE_CEILING_DEPTH,0,1,&ray,&p);
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// draw wall
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@ -1503,7 +1516,7 @@ void _RCL_columnFunctionSimple(RCL_HitResult *hits, uint16_t hitCount,
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p.depth = (_RCL_camera.resolution.y - y) * _RCL_horizontalDepthStep + 1;
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#endif
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_RCL_drawVertical(y,_RCL_camResYLimit,-1,_RCL_camResYLimit,
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_RCL_drawHorizontalColumn(y,_RCL_camResYLimit,-1,_RCL_camResYLimit,
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_RCL_camera.height,1,RCL_COMPUTE_FLOOR_DEPTH,RCL_COMPUTE_FLOOR_TEXCOORDS,
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-1,&ray,&p);
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}
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@ -1627,8 +1640,6 @@ RCL_PixelInfo RCL_mapToScreen(RCL_Vector2D worldPosition, RCL_Unit height,
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{
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RCL_PixelInfo result;
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RCL_Unit d = RCL_dist(worldPosition,camera.position);
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RCL_Vector2D toPoint;
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toPoint.x = worldPosition.x - camera.position.x;
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10
settings.h
10
settings.h
@ -108,4 +108,14 @@
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*/
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#define SFG_HEADBOB_OFFSET 200
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/**
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Camera shearing (looking up/down) speed, in vertical resolutions per second.
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*/
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#define SFG_CAMERA_SHEAR_SPEED 3
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/**
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Maximum camera shear (vertical angle). 1024 means 1.0 * vertical resolution.
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*/
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#define SFG_CAMERA_MAX_SHEAR 1024
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#endif // guard
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